In guinea pigs, the gene B for black color is dominant over the gene b for albin
ID: 3165348 • Letter: I
Question
In guinea pigs, the gene B for black color is dominant over the gene b for albino. The gene R for rough fur is dominant over the gene r for smooth fur. In the table below, the number of progeny is given for 5 (a-e) separate matings. Give the most probably genotype for each parent in each of the matings?
Parental Phenotype
Black, rough
Black, smooth
Albino, rough
Albino, smooth
Black, smooth X albino, smooth
0
18
0
14
Black, smooth X albino, rough
25
0
0
0
Black, smooth X albino, rough
10
8
6
9
Black, rough X albino rough
15
7
16
3
Albino, rough X albino rough
0
0
32
12
Parental Phenotype
Black, rough
Black, smooth
Albino, rough
Albino, smooth
Black, smooth X albino, smooth
0
18
0
14
Black, smooth X albino, rough
25
0
0
0
Black, smooth X albino, rough
10
8
6
9
Black, rough X albino rough
15
7
16
3
Albino, rough X albino rough
0
0
32
12
Explanation / Answer
1--For ,black smooth * Albino smooth,Bbrr*bbrr
2--For, black smooth*albino rough Bbrr*bbRr
3--For, blackbsmooth*albino rough ,Bbrr*bbRR
4--For,black rough*albino rough,BBRR*bbRr
5--For, albino rough*albino rough,bbRR*bbRr